Thermal neutron scattering kernels for sapphire and silicon single crystals. (June 2015)

• Record Type: Journal Article
• Authors: Cantargi, F.; Granada, J.R.; Mayer, R.E.
• Is Part Of: Annals of nuclear energy. Volume 80(2015:Jun.)
• Page Start: 43
• Page End: 46
• Publication Date: 2015-06
• Subjects: Sapphire neutron filter -- Silicon neutron filter -- Thermal scattering law data -- Cross section libraries -- Total cross section measurements; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2015.01.020
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: Thermal cross section libraries for sapphire and silicon single crystals were generated. Debye model was used to represent the vibrational frequency spectra to feed the NJOY code. Sapphire total cross section was measured at Centro Atómico Bariloche. Cross section libraries were validated with experimental data available. Abstract: Sapphire and silicon are materials usually employed as filters in facilities with thermal neutron beams. Due to the lack of the corresponding thermal cross section libraries for those materials, necessary in calculations performed in order to optimize beams for specific applications, here we present the generation of new thermal neutron scattering kernels for those materials. The Debye model was used in both cases to represent the vibrational frequency spectra required to feed the NJOY nuclear data processing system in order to produce the corresponding libraries in ENDF and ACE format. These libraries were validated with available experimental data, some from the literature and others obtained at the pulsed neutron source at Centro Atómico Bariloche.